====== Axelrod's tournament ======

How can cooperation arise and persist when there is a temptation to “defect” from cooperation for personal gain? [[wp>Cooperation]] is a well-studied problem in economics, social sciences, and evolution.

In the early 1980s [[wp>Robert Axelrod]] invited colleagues to submit strategies to a series of round-robin tournaments ([[https://www.zotero.org/rikblok/items/itemKey/EBG8XDKU|Axelrod & Hamilton, 1981]]) to see which strategies would do well playing an [[wp>Prisoner%27s_dilemma#The_iterated_prisoner.27s_dilemma|iterated Prisoner's Dilemma]].  This [[http://ccl.northwestern.edu/netlogo/|NetLogo]] model allows you to try [[wp>The_Evolution_of_Cooperation#Axelrod.27s_tournaments|Axelrod's tournaments]] yourself by creating some strategies and testing them in an iterated Prisoner's Dilemma.


{{ https://raw.githubusercontent.com/rikblok/NetLogo-models/master/axelrod-tournament.nlogo }}

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